Tweaks for better message skip experience

- Any key input detected in skippable wait functions will cancel the
  skip mode (regardless of skipModeInterruptable value).
- Space key (right click) in sys_getInputInfo() will no longer cancel
  the skip mode.
- Add 30ms wait in sys_hit_any_key() (used by the 'A' command) so that
  users can see what's going on while skipping.
- Cancel the skip mode when opening a menu, not when closing it.

src/selection.c

@@ -408,6 +408,8 @@ void sel_select() {
 	int preElement = -1;
 	int key, prevkey = 0, i;
 	
+	if (get_skipMode2()) set_skipMode(FALSE);
+
 	saveimg2 = NULL;
 	keymode = 0;
 	
@@ -502,6 +504,4 @@ void sel_select() {
 		}
 		last_selected_element = 0;
 	}
-	
-	if (get_skipMode2()) set_skipMode(FALSE);
 }